Clock-alarm



(No Model.)

L. HUBBELL.

GLOGK ALARM.

No. 342,205. Patented May 18, 1886.

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UNITED STATES PATENT OFFICE.

LAPORTE HUBBELL, OF FORESTVILLE, CONNECTICUT.

CLOCK-ALARM.

FJPEGIPICATION forming part of Letters Patent No. 342,205, dated May 18, 1886.

Application filed February 18, 1886. Serial No. 192,325.

To all whom it may concern.-

Be it known that I, LAPORTE HUBBELL, of Forestville, in the county of Hartford and State of Connecticut, have invented a certain new and useful Improvement Pertaining to Alarm Attachments for Clocks, of which the following is a description, reference being had to the accompanying drawings, wl1ere Figure 1 is a front view of an alarm attachment embodying my improvement, with the front plate removed. Fig. 2 is an edge view of the same (entire) alarm attachment. Fig. 3 is a View from the inner side of the camwheel h, tripping-lever g, and a portion of the escapement-wheel c, hereinafter referred to, the parts being in the position they occupy at the beginning ofthe tripping movement. Fig. 4 is a detail view, the same as Fig. 3, except that the parts are in the position they occupy while the alarm is sounding.

As the title hereinbefore given to this improvement sufliciently indicates, it is in the nature of an alarm attachment for clocks. It finds especial utility as an alarm attachment for eight-day clocks, or any other clock running a plural number of days.

The drawings show the attachment only.

The letter a denotes the striking arm or pendulum, and b denotes the bell. This striking arm or pendulum is practically one, with its pivot-shaft c and the escapement-pallcts (Z upon said shaft.

The letter 0 denotes the rotating eseapementwheel spurred at its periphery and in rotation cooperating with the escapement-pallets (Z (Z, to give the hammer a its requisite vibration for sounding an alarm. This escapementwheel is driven by the spring f, operating through a suitable train of clock gearing. The arrow upon the escapement-wheel shows the direction in which the spring drives this wheel in sounding an alarm.

The letter 9 denotes a pivoted tripping-1e ver which co-operates at one end with the escapement-wheel c and at the other end with the cam-wheel h, which, when the eseapement is released, is driven by the spring f in the direction indicated by the overlying arrow, but remains rotarily stationary while the spring is being wound up. This cam-wheel h is a disk bearing on its periphery one or more of the cams 71 The tripping-lever g' bears upon one side, near the end which is next the cam-wheel, the cam-pin t. The light spring 5 5 j holds the cam-pin 'Z to contact with the pe- (No model.)

riphery of the canrwheel. lVhen the escape ment is released, the cam'pin z is in contact with the periphery of the then rotating camwheel 7:. \Vhen the cam h reaches this campin, it pushes this cam-pin outward until the canrpin rests upon the end of the cam. The lever is of course correspondingly moved, and when the cam-pin i is upon the extremity of a cam, 71., the trip-pin 7. situated at or near the opposite end of this lever, is in the path of the escapement-pin Z, which is borne upon the side of the cscapement-wheel, thereby preventing the escapement'wheel from rotating and stopping the sounding of the alarm.

The letter in denotes a pull-wire operated at one end by the ordinary alarm-setting mechanism of a clock. At the set and determined time this ordinary alarm-setting mechanism operates to give a pull upon this pull-wire in the direction indicated by the arrow, and the result is that the trip-pin It is thereby moved out of the path of the escapement-pin Z, whereby the eseapement-wheel is released, starting the alarm, and the alarm continues in the rotation of the cam-wheel h, and cam it is brought under the cam-pin 2 throwing the trip-pin it again into the path of the eseapement-pin Z, thereby stopping the rotation of the escapement-wheel, and, of course, the sounding of the alarm.

The letter 0 denotes an auxiliary trip-pin that is, a pin auxiliary to the regular trip-pin k-against which auxiliary trip-pin the escapement-pin Z strikes when it is first released from contact with the trip-pin 7t, thereby creating a short interval of rest in the escapementwheel, desirable for the proper operation of the parts.

The letter n denotes a stop for one end of the trip-lever.

I claim as my improvement 1. In combination, the escapement-wheel bearing the pin Z, the trippinglever bearing the pins '5 7t, and the cam-wheel provided with cam or cams 71, all substantially as described, and for the purpose set forth.

2. In combination, the escapement-wheel c,

provided with pins Z, the tripping-lever 9,

provided with pins i it 0, and the rotating cam-wheel provided with cam or cams h, all substantially as described, and for the purpose set forth.

lVitnesses: LAPORTE HUBBELL.

WM. EDGAR SIMONDS, A. O. TANNER. 

